Our two genius roommates, Leonard and Sheldon, and their friends are back once again (smarter, but no wiser). Last season, Sheldon went soul-searching (on a train, of course) and was prepared to make some substantial revisions on his Relationship Agreement with Amy, when everything changed. Leonard, meanwhile, was off to Vegas with Penny to finally tie the knot in the season finale. Howard finds himself alone with Bernadette after the sudden passing of his mother; while Raj is not only talking to women – he’s getting exclusive with Emily. Together, they will all learn that life is far more complicated outside of the lab as love and friendship never produce predictable results!
24 Episodes
  • The Matrimonial Momentum
    The Matrimonial MomentumEpisode 1
  • The Separation Oscillation
    The Separation OscillationEpisode 2
  • The Bachelor Party Corrosion
    The Bachelor Party CorrosionEpisode 3
  • The 2003 Approximation
    The 2003 ApproximationEpisode 4
  • The Perspiration Implementation
    The Perspiration ImplementationEpisode 5
  • The Helium Insufficiency
    The Helium InsufficiencyEpisode 6
  • The Spock Resonance
    The Spock ResonanceEpisode 7
  • The Mystery Date Observation
    The Mystery Date ObservationEpisode 8
  • The Platonic Permutation
    The Platonic PermutationEpisode 9
  • The Earworm Reverberation
    The Earworm ReverberationEpisode 10
  • The Opening Night Excitation
    The Opening Night ExcitationEpisode 11
  • The Sales Call Sublimation
    The Sales Call SublimationEpisode 12
  • The Empathy Optimization
    The Empathy OptimizationEpisode 13
  • The Meemaw Materialization
    The Meemaw MaterializationEpisode 14
  • The Valentino Submergence
    The Valentino SubmergenceEpisode 15
  • The Positive Negative Reaction
    The Positive Negative ReactionEpisode 16
  • The Celebration Experimentation
    The Celebration ExperimentationEpisode 17
  • The Application Deterioration
    The Application DeteriorationEpisode 18
  • The Solder Excursion Diversion
    The Solder Excursion DiversionEpisode 19
  • The Big Bear Precipitation
    The Big Bear PrecipitationEpisode 20
  • The Viewing Party Combustion
    The Viewing Party CombustionEpisode 21
  • The Fermentation Bifurcation
    The Fermentation BifurcationEpisode 22
  • The Line Substitution Solution
    The Line Substitution SolutionEpisode 23
  • The Convergence Convergence
    The Convergence ConvergenceEpisode 24
Cast of Season 9
  • Johnny GaleckiLeonard Hofstadter
  • Jim ParsonsSheldon Cooper
  • Kaley CuocoPenny
  • Simon HelbergHoward Wolowitz
  • Kunal NayyarRajesh Koothrappali
  • Melissa RauchBernadette Rostenkowski
  • Mayim BialikAmy Farrah Fowler
Watch Season 9 Videos
  • The Big Bang Theory: Season 9
  • The Big Bang Theory: Wedding

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